FR2279066A1 - Direct visualisation of three-dimensional shape - by superposition of images of periodic structures projected onto object to form fringes - Google Patents

Direct visualisation of three-dimensional shape - by superposition of images of periodic structures projected onto object to form fringes

Info

Publication number
FR2279066A1
FR2279066A1 FR7424540A FR7424540A FR2279066A1 FR 2279066 A1 FR2279066 A1 FR 2279066A1 FR 7424540 A FR7424540 A FR 7424540A FR 7424540 A FR7424540 A FR 7424540A FR 2279066 A1 FR2279066 A1 FR 2279066A1
Authority
FR
France
Prior art keywords
superposition
images
dimensional shape
projected onto
periodic structures
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7424540A
Other languages
French (fr)
Other versions
FR2279066B1 (en
Inventor
Francois Jean Samuel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MORIN SECRETAN RECH PERFECTION
Original Assignee
MORIN SECRETAN RECH PERFECTION
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MORIN SECRETAN RECH PERFECTION filed Critical MORIN SECRETAN RECH PERFECTION
Priority to FR7424540A priority Critical patent/FR2279066A1/en
Publication of FR2279066A1 publication Critical patent/FR2279066A1/en
Application granted granted Critical
Publication of FR2279066B1 publication Critical patent/FR2279066B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object
    • G01B11/254—Projection of a pattern, viewing through a pattern, e.g. moiré
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/60—Systems using moiré fringes

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Optics & Photonics (AREA)

Abstract

The service comprises a projector on whose output aperture is attached a plate (2) on which a periodic engraving is made, and a photosensitive plate (8), e.g. photographic apparatus, whose axis makes pref. the same angle (alpha) with the normal to the reference plane (7) as that made by the projector axes with the same normal. A purely optical projection of a first periodic structure is made into the object (4) and this image is superimposed onto the photosensitive plate (5) with that of another purely optical projection of the first or a second periodic structure onto either the object (4) or a reference plane (7). Moire fringes appear representing contour lines within the object (4).
FR7424540A 1974-07-15 1974-07-15 Direct visualisation of three-dimensional shape - by superposition of images of periodic structures projected onto object to form fringes Granted FR2279066A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7424540A FR2279066A1 (en) 1974-07-15 1974-07-15 Direct visualisation of three-dimensional shape - by superposition of images of periodic structures projected onto object to form fringes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7424540A FR2279066A1 (en) 1974-07-15 1974-07-15 Direct visualisation of three-dimensional shape - by superposition of images of periodic structures projected onto object to form fringes

Publications (2)

Publication Number Publication Date
FR2279066A1 true FR2279066A1 (en) 1976-02-13
FR2279066B1 FR2279066B1 (en) 1981-03-27

Family

ID=9141284

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7424540A Granted FR2279066A1 (en) 1974-07-15 1974-07-15 Direct visualisation of three-dimensional shape - by superposition of images of periodic structures projected onto object to form fringes

Country Status (1)

Country Link
FR (1) FR2279066A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2357054A1 (en) 1976-06-29 1978-01-27 Rca Corp PROCESS FOR INSPECTING CATHODIC RAY TUBES, ESPECIALLY TELEVISION IMAGE TUBES
EP0121353A1 (en) * 1983-03-07 1984-10-10 New York Institute Of Technology Projection moire topography
EP0445618A2 (en) * 1990-03-09 1991-09-11 Firma Carl Zeiss Device and procedure to measure without contact the surface-contour of an object
US11555925B2 (en) 2018-12-04 2023-01-17 Valeo North America, Inc. Automotive level determination

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2357054A1 (en) 1976-06-29 1978-01-27 Rca Corp PROCESS FOR INSPECTING CATHODIC RAY TUBES, ESPECIALLY TELEVISION IMAGE TUBES
EP0121353A1 (en) * 1983-03-07 1984-10-10 New York Institute Of Technology Projection moire topography
US4564295A (en) * 1983-03-07 1986-01-14 New York Institute Of Technology Apparatus and method for projection moire topography
EP0445618A2 (en) * 1990-03-09 1991-09-11 Firma Carl Zeiss Device and procedure to measure without contact the surface-contour of an object
EP0445618A3 (en) * 1990-03-09 1992-03-11 Firma Carl Zeiss Device and procedure to measure without contact the surface-contour of an object
US5135309A (en) * 1990-03-09 1992-08-04 Carl-Zeiss-Stiftung Method and apparatus for non-contact measuring of object surfaces
US11555925B2 (en) 2018-12-04 2023-01-17 Valeo North America, Inc. Automotive level determination

Also Published As

Publication number Publication date
FR2279066B1 (en) 1981-03-27

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Legal Events

Date Code Title Description
TP Transmission of property
TP Transmission of property
ST Notification of lapse